Abstract
Backscatter factors (BSF) in the diagnostic radiology quality range (1-4 mm Al) have been determined by ionisation chamber and TLD techniques. Ionisation chamber measurements are subject to systematic errors due to displacement of the scattering medium, although high precision allows the demonstration of the kVp dependence of BSF for a given first HVL. TLD techniques lead to a reduction of these systematic errors although the read-out procedures lead to lower precision than ionisation chamber measurements. Comparison of the TLD-based measurements with the data of Br. J. Radiol. Supplement 11 (1972) indicates good agreement (<2%) for HVLS greater than 2 mm Al and field sizes greater than 10 cm*10 cm. Comparison with the work of other authors not covered by Supplement 11 indicates, in general, good agreement only where kVp-filter combinations are similar. The importance is stressed of taking into account the kVp-filter combination when defining the quality of an X-ray beam.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
